import  unittest
from li1331 import fo
class myTest(unittest.TestCase):
   def test_fo1(self):
      x=fo(9)
      self.assertEqual(x,-9)
   def test_fo2(self):
      x=fo(-9)
      self.assertEqual(x,9)
   def test_fo3(self):
      x=fo(0)
      self.assertEqual(x,0)
if __name__ == '__main__':
   unittest.main()


















# import unittest
# from li1331 import myAbs

# class myTest(unittest.TestCase):      
#       def test_myAbs1(self):
#          x = myAbs(-5)
#          self.assertEqual(x,5)
#       def test_myAbs2(self):
#          x = myAbs(5)
#          self.assertEqual(x,-5)         

# if __name__ == '__main__':
#     unittest.main()